Collatz in Python in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Gray Code Decoder Gray Code Encoder Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 635th ArenaGrenade 708 89 25ms 19 Feb 2024 635th NanduBC 708 89 23ms 6 Sep 2024 635th TheAtrossian 708 89 23ms 5 Jan 2025 635th KimJua41 708 89 20ms 4 May 2025 635th Nathan-Masala 708 89 30ms 5 days ago 646th StoverGitHub 700 90 22ms 16 Jun 2022 646th jamespeilunli 700 90 24ms 4 Jul 2022 646th TrentGlimp 700 90 20ms 3 Sep 2022 646th Ugoran 700 90 20ms 19 Nov 2022 646th PATTRIM 700 90 19ms 5 Jan 2023 646th charliegaming 700 90 19ms 3 Oct 2023 646th lhulinsky 700 90 19ms 22 Oct 2024 646th bthalheim 700 90 22ms 6 Dec 2024 646th nooby31415 700 90 20ms 18 Apr 2025 646th SinArieh 700 90 25ms 4 May 2025 646th islptng 700 90 23ms 7 Jul 2025 646th Mr-McChicken 700 90 18ms 4 Oct 2025 646th NoneTheFewer 700 90 20ms 4 Dec 2025 659th AbelPelser 692 91 23ms 3 Jul 2022 659th Seis 692 91 18ms 9 Dec 2022 659th r-i-c-e 692 91 21ms 9 Jul 2023 659th joshcors 692 91 17ms 30 Jun 2024 659th resoNathan 692 91 16ms 9 Jul 2024 659th jameswmccarty 692 91 21ms 24 Sep 2024 659th hamilton-bonds 692 91 19ms 12 Nov 2024 659th Wonamm 692 91 28ms 14 Feb 2025 667th TimLeffke 685 92 22ms 17 Aug 2022 667th Rythoka 685 92 17ms 17 Oct 2022 667th UriyaBA 685 92 16ms 19 Mar 2023 667th VladislavGitter 🇪🇸 685 92 19ms 14 Nov 2023 667th ridingqwerty 🇺🇸 685 92 16ms 22 Dec 2023 667th Thonoton 685 92 19ms 1 Feb 2024 667th OCNeve 685 92 19ms 17 Jun 2024 667th themoonisacheese 685 92 24ms 25 Feb 2025 667th BabySharkHi 685 92 21ms 22 Apr 2025 667th arjunarya1 685 92 17ms 28 Aug 2025 667th TJK-S 685 92 22ms 10 Oct 2025 678th Bananapants22 677 93 27ms 4 Sep 2022 678th jaxmattfair 🇺🇸 677 93 18ms 10 Jan 2023 678th cingulataluke 677 93 21ms 27 Aug 2023 678th fenix-bear 677 93 20ms 18 Nov 2023 678th epic-programmer-guy 677 93 23ms 22 Dec 2023 678th brimstonetrader 677 93 26ms 18 Nov 2024 678th HunterC14 677 93 28ms 10 Feb 2026 685th atazzam 🇺🇸 670 94 18ms 18 May 2022 685th rohangpta 670 94 16ms 8 Aug 2022 685th shinylego 670 94 24ms 14 Sep 2022 685th sgaltair 670 94 19ms 4 Nov 2022 685th TotoAJ 670 94 19ms 15 Dec 2023 685th Gusic06 670 94 19ms 6 May 2024 685th kyleyarwood 670 94 23ms 6 Oct 2024 685th jj0786-cell 670 94 22ms 1 Apr 2025 685th griffinschreiber 670 94 27ms 1 Apr 2025 685th o800 670 94 18ms 17 Nov 2025 695th felixcroc 663 95 20ms 30 Mar 2023 695th Pyro569 663 95 20ms 4 Jul 2023 695th rm-rf-innocence 663 95 20ms 19 Dec 2023 695th Bit125 663 95 21ms 30 Jan 2024 695th aalec 663 95 23ms 25 Apr 2024 695th strogor 663 95 20ms 13 Jun 2025 695th cthierfelder 🇲🇨 663 95 20ms 17 Jul 2025 695th ThomasDelepine 663 95 23ms 29 Oct 2025 695th professor-l 663 95 16ms 12 days ago 704th karhuthebear 656 96 23ms 9 May 2022 704th qwjhvbxi 656 96 23ms 6 Feb 2024 704th alfonsoalves 656 96 19ms 21 Jul 2024 704th jeff-re 656 96 18ms 1 Apr 2025 708th a-penton 649 97 16ms 22 Sep 2022 708th jrbud 649 97 19ms 6 Jan 2024 708th befoster 649 97 22ms 22 Feb 2024 708th joshua-el-samalouti 🇩🇪 649 97 20ms 26 May 2024 708th luca1339 649 97 19ms 10 Jun 2024 713th lukemalek 643 98 15ms 10 Oct 2022 713th UltimateGuy0987 643 98 20ms 14 Oct 2022 713th TheLazySquid 643 98 20ms 20 Dec 2022 713th StronkCheese 🇺🇸 643 98 21ms 13 Mar 2023 713th Anthony-Williams-06 643 98 27ms 17 Oct 2023 713th abcdhhhh 643 98 15ms 27 Aug 2024 713th OSYCh314 🇦🇺 643 98 26ms 16 Nov 2024 713th cole-wilson 643 98 18ms 9 Dec 2024 First Prev 641–720 of 850 Next Last